Cam making machine



June 14, 1949. G, x JOHNSTQN 2,472,902

CAM MAKING MACHINE GEORGE X. JOH/VJTOM June 14, 1949. G. x. JoHNsToN CAMMAKING MACHINE 6 Sheets-Sheet 2 Filed July 15, 1947 G. X. JOHNSTON l omMAKING MACHINE June 14, 1949.

Filed July 15, 1947 6 Sheets-Sheet 3 v June 14, 1949. G. x. JoHNs'rN2,472,902

cm MAKING MAcHINE Filed July 15, 194'( 6 Sheets-Sheet 5 F/G. ri.

GEORGE x. Jam/sro,

June 14, 1949.. G. x. JOHNSTON CAI MAKING MACHINE 6 Sheets-Sheet 6 FiledJuly 15, 1947 v IN V EN TOR.

@meer ix, Jol/mrow,

t, w.. n w r. .A

meteory Patented June-'14, A19,49

uNfirED STATES t PATENT "OFFICE George X. Johnston, St. Claim-Mich.Apgiisuenjuiy 1s, 1941, sensi Ne. 750,973

i1 einen. (ci. 's1-5o) This. invention relates to cam generatingmachines, and more particularly to a lmachine for manufacturing cams 'ofeither the radial or axial type without the use of master cams. v

A- main object of the invention is to provide a novel and improved camformingmachine which issimple to operate, accurate in performance andreadily adJustable for forming either radial cams or axial cams asdesired.

A further object of the invention is to providey a novel and improvedcam forming machine which may be employed togenerate cams of either theradial or axial type without the use of master "cams, said machine beingsturdy in) construction,

' reliable in operation `and adjustablefor' a very widerange of camdesigns.

A stillI further object ofthe invention is to disc-like planar.'element,or of the axial type. wherein the cam surface is generated along thelongitudinal contour of an axially rotatable three-dimensional element,the generation of the cam in either type being' accomplished by moving afollower along a guide track formed to provide vertical movement of thegenerating follower in accordance'with the intended movement which itisdesiredto lmpart'tothe cam follower which f must ultimatelycooperatewith the finished cam,

the movement of the generating followerbeing transmitted to the camforming tool andv the Ycam blank being rotated around a vertical axissynchronously with Further objects and advantages of the inventio'n'willbecome apparent from the following de- Y scription and claims, and fromthe accompanying drawings,'wherein: v

' Figure 1 is a -front elevational view partly in cross-section, andwithits front wall removed of a cam forming machine constructed inaccordance with the present invention.

- Figure 2 is a vertical transverse cross-sectionall view taken on line2 2 of Figure 1 and showing' the cam forming tool in operative positionthereon. A

Figure 3 is-a top plan view of the cam forming machine of Figure 1 withthe rotating means for the cam blank removed. l

. Figure 4 is a top plan view similar to Figure 3 but partly broken awayto reveal internal struc- Figure 5 is a cross-sectional detail viewofthe themovement of said cam formin g collar of Figure 8L verticalguide support for the forming tool mechanism taken on line V5--5 ofFigure 1.

Figure 6 is a cross-sectional-detai1. Viewv of the;v vvertical support'for the forming taken on line 6-6 of Figure 1.

Figure '1 is a detail cross-sectional viewof the verticalisupportfor theforming tool mechanism `taken on line 1-1 of Figure 1.

Figure 8 is a rear elevationaldview -of a' bearing collar for gthe screwgear adjusting'. shaft einV ployed in adjusting the angle ofinclination' of the follower. guide employed in the machine of.Figure-1.

Figure 9 is a side le'levational.\ 'ie w ofthe bear- Figure 10 is a sideelevational dtail view ofa cam grinding t'ool which may beemployed on fthe machine of Figure 1.

Figure 11 is -an end elevational detail view of a supporting bracket foracutting torch' which' I f may be employed on the machine of Figure 1.

l Figure 1 2 is aside elevational view of the torch "supporting bracketof Figure 11.

Figure 13 is a fragmentary side `elevational view of the cam formingmachine of Figure 1 showing the indicating means for determining thelangle of adjustment of the follower guide.

Figure 14 is an enlarged plan detail view of a reversing mechanismemployed in the machine of Figure 11 for reversing the motion of the camforming tool with'respect to that of the cam Figure 15 is an elevationalview' of the' reversing mechanism of Figure '14. Figure 16 is anenlarged cross-sectional'detail view taken on line |6-I 6 of Figure 2.

Figure 17 is an enlarged front elevational view of the adjustablesecuring means for the follower guide employed in the machine ofFigurel.

Figure 18 is an enlarged cross-sectional detail view taken on line li 8of Figure4.

Figure 19 is an enlarged cross-sectional detail -view taken on une la-ls of Figure 4.

Referring to the drawings, I I designates a, generally rectangularsupporting table structure, said table structure comprising front andrear vertical walls I2- and I3, a left end vertical wall I4 and a rightend vertical wall l5, said.vertica1 walls being rigidly secured togetherby any suitable means to define a rectangular enclosure. Secured in thetop portion of the enclosure at the right end thereof is a horizontalbearing plate I6 on which is rotatively mounted an annular worm gear I1.Secured toiworm gear I1 is a circular face plate i8 which is formedatits top surface with a plurality of inverted T-shaped equally spacedradial grooves I9 for clamping a cam blank thereto. Face plate I6 isformed-with a depending annular flange 26 which seats on worm gear I1and at which the face plate is secured by bolts 2I to the worm gear. Anapertured bracket plate 22 secured to the walls of the table II receivesthe annular flange and overlies the worm gear I1 to restrain the wormgear and face plate against upward movement and translational movementin a horizontal plane while allowingsaid worm gear and face plate torotate around a vertical axis. Meshing with Worm gear i1 is atransversely extending worm 23 carried on a shaft 24. Secured inside thetable II adjacent the shaft 24 and below the bearing plate I6 is atransverse vertical plate member 25 and secured thereto below the shaft24 is a horizontal bracketplate 26. bracket-21 which is pivoted at 28 tobracket plate 26. extends through bracket 21. Shaft carries at its lowerend an eccentric 3| which `is rotatable in bracket plate 26. By rotatinghandle 3l in a horizontal plane the bracket 21 may be swung outwardly todisengage worm 23 from worm gear Worm shaft 24 is journaled. in abearing as shown at 6I to an opstanding lug 62 carried A spective rackmembers 66, 66.

Threaded into the ends of follower guide 66 and passing through theslots '59, 59 are bolts 61, 6'! and secured to the ends of the followerguide are guide brackets 68, 68 slidably receiving the respective racks66, 66. Secured to each bolt A vertical shaft 36 having a top handle-3I61 inside a guide bracket 68 is a gear 69 meshing with the adjacent rack66. The inner ends of the racks mesh with a gear 16 integrally securedon a shaft 1I extendingv through bearing aperture 64 in bracket'member63, Shaft 1I is journaled in a `suitable Ybearing sleeve, shown at 12,secured to bracket member 63. Said sleeve and shaft project throughfront wall I2 and the shaft -is provided with a squared outer end 13which is provided with a crank 1L Front wall I2 is horizon- I1, therebypermitting the face plate I8 to be i freely revolved if such is desired.

The end of worm shaft 24 is plvotally connected at 32 to a shaft 33journaled in a bearing sleeve 29 secured to front wall i2, said shaftpassing through the table wall I2 and terminating at its outer portionin a squared end 34 adapted to be engaged by a suitable operating crank44. A

calibrated drum 35 is carried by shaft 33 and crank. Shaft 38 carries acalibrated drum 42' tally slotted, as shown at 15 to permithorizontalmovement of the sleeve 12 as the follower guide moveshorizontally during the cam forming process. Front wall I2 is calibratedwith an arcuate scale 16 concentric with the mid-point of slot 16.Secured to sleeve I2 by a collar member 12is' a pointer arm 11 whichindicates the angle of adjustment of the follower guide on scale 16whenA said follower guide is positioned so that shaft 1i is concentricwith the arcuatescale` 16. Arm 11 is also employed as a handle to varythe angle of the follower guide when the clamping bolts 61 are loosened.i,

By rotating handle 'I4 in one direction the racks 66, 66 loosen the gearbolts 61, 6'14so that the fol. lower guide 60 may be set in a desiredposition of inclination. By ,rotating handle 14 in the oppositedirection the racks 66, 66 tighten the gear bolts to s'ecure thefollower guide 66 in its adjusted position in the arcuate slots 59,59-of the arms Secured to the rear'wall I3 of the table II is a verticalcolumn member 18 and interlocked therewith for sliding movement in avertical diand wall I2 carries an index pointer 43'over-lying theperiphery of drum 42 for indicating the degrecs of rotation of faceplate I8 when the shaft 38 is employed to rotate same.

Journaled in the table iljin a bearing sleeve 44 secured to wall I2below bearing sleeve 29 is a transverse shaft 45 extendingthrough wallI2l At its outer portion shaft 45 carries a gear 46 which meshes with asmaller gear 41 carried by shaft 33. Shaft 45 is connected through a re`versing clutch 48 to a shaft 49- journaled in a bearing bracket 50secured to the transverse plate mmeber 25. Shaft 49 carries a worm'5iwhich rection is a'blook member 19. Block member 19 has secured theretoa forwardly projecting horizontalA shaft v8Il on which is journaled afollower roller'SI having a peripheral flange 82. Roller 8| overlies thetop surface of follower guide 66, said follower guide top surface beingformed with a groove 83 adapted to receive the flange 82 to meshes witha worm gear 52 carried on a vertical shaft 53 suitably journaled inbearing bracket 50.

The bottom end of shaft 53 is journaled in a bear? ing 54 suitablysecuredto the rear table wall I3 by means of a bracket member 55. Thebottom end portion of shaft 53 carries a gear 56. Bracket member 55 isformed with a longitudinally ex-y tending horizontal -gudeway Iin whichis slidably positioned a rack member 51 which is in mesh with the gear56. Rack member 51 carries a pair of opposed upwardly projectinglslotted arcuate arms 58, 58 and adjustably secured in thearcuate slots59, 59 thereof is an inclined follower guide 66, plvotally connected atitsmid-poi-tion,

maintain the roller in tracking engagement with l the follower-guide topsurface at all times. When the rack 51 is moved to the left, as viewedin Figure 1, block 7 9 therefore rises and when the rack 51 is moved tothe right, block 19 is allowed to drop, The degree and direction ofvertical movement of block 19 for a given motion of rack 5l is of coursegoverned by the angular position of adjustment of the follower guide 66.

The sliding engagement o f block 19 with column member 18 is in avertical groove 84 formed v in said column member, as'shown in Figure 6.

v horizontal forwardly extending support member 81 which is formed vwitha longitudinal dovetail guide track 88. Slidably engaged with guidetrack 88 is a support member 69 which extends transversely with respectto table' II and is longitudi- 5 nally `adjustable thereon. ,formed witha transverse dovctail guide track 90.

slidably. engaged with guide track'90 is a tool.

support 9| which is ,adjustable along the length of guide track 90.Bymoving support member v,89 along guide track 88 and by moving toolsuppQrt adjusted to' any position in a Ihorizontal plane in SLUPbOrtmember 89 is 9| along guldeftrack 90, said tool support may be 1 an areadefined by the length of longitudinal track 88 and transverse track 90.Y

` T ool support 9| may be manually adjusted on guide track 90 by meansof an adjusting screw 92 Journaled in the forward portion of supportlmember 89 and 'threadedly engaging a nut 93 carried by the tool supportand depending therefrom into-a transversely extending slot94 formed inthe support member 89. An operating handle 95 is secured to the outerend of screw 92.

The guide track 88 is formed with a longitudinal groove 96 and slidablypositioned therein at the left end of the track 88 is a block member 91Journaled in block member 91 is a screw` member 98 which threadedlyengages ay nut 99 carmember and shaft |05 to raise the rack bar y|08 toits desired position- When a radial c am.

is to be formed the projections |2 are engaged in the gear openings.||3,thus coupling the longitudihal rack bar member |03 to the vertical rackybar |08 in the manner above described. When an axial camis to beformed, vertical rack bar |08 is locked in anelevated inoperativeposition.

.In its upper portion, column `member 18 is formed with a verticalrectangular groov'e H5 in which is slidably positioned a -rectangularcollar. member I6 secured to kneemember 86. slidably .received incollarmember I I6 and non-rotatively keyed thereto isa vertical screw ||1whose bottom end is adapted to engage the, block 19, 'whereby verticalmovement of said block )19 may be transmitted to the knee member 86.Rotatably engagrled by support member' 89 and depending there- I' frominto groove.96. An operating handle |00 is secured tothe outer end ofscrew member 98, whereby support member 89 may be manuallyad- 'justedlongitudinally with vrespect to the block member 91.V Block m'ember 91may be locked to track 88 ina desired position of adjustment thereofrelative to the support member'89 by a locking pin |0 I.' Secured toblock member 91 by bolts |02 is a longitudinally extending bar member orrack |03 carried vin groove 96 and formed at its bottom' surface withrack teeth. Extending through an opening |13' 'formed in the bottom walloi the inner portion of groove 96 and meshing with said rack teeth is a.gear|04 freely rotatable on a transverse shaft |05I journaled to thebottom of support member 81. Shaft |05 carries at' its rear end a gear|06 which isV received in a vertical groove |01 formed in the columnmember 18.` P- sitioned vertically and slidably in said groove |01bottom end of rack bar `|08 is adapted to engage the top surface ofblock 19, whereby vertical .movement of said block will be transmittedto said rack bar', causing gear |06 and shaft |05.to rotate.

A sleeve member |'|0 is slidably mounted on shaft |05 so as to bemovable axially thereon butis keyed to said shaft so as to rotatetherewith. Sleeve member |'0 carries a clutch collar having projections||2 adapted to be Aengaged iny openings ||3 formed in gear |04. At itsouter end, sleeve memberI |0 is provided with a squared is a rack bar|08 meshing with gear |06. The

stud'||4 which may be engaged by a suitable wrench or crank. i

When sleeve member ||0 is in an inwardly ading the bottom portion Aofcollar member ||6 is a nut member ||8 threadedly engagedV with screw ||1and having a bottom flange underlying collar member |18 and formed withbevel gear teeth. Thus, as screw ||1 is raised by block 19, the nut ||8is raised carryingwith it col1ar` ||6,`knee member 86 and support 81.Likewise, as the nut ||8 is lowered, collar ||6I and the'related partsride downwardly with it. The bevel gear portion of nut member ||8 ismeshed with a bevel gear ||9 carried at the end of a. horizontal shaft|20 ASupported on the top of vcolumn member 18 is a shouldered collar|22 through which the vertical screw ||1 passes. A nut |23 is threadedon rscrew |'|1 above said' collar by means of--which the screw ||1 mayat times be lifted so that its lower end is above the range vof verticalmovement of block 19 and may be thus locked in an inoperative position,as when radial cams are to be formed. When axial `camsvare to be formed,

the screw member ||1 is in alowered position so that its bottom endengages the block 19 and the knee member 86 follows the verticalmovements of said block.

Any. suitable camformng tool may be secured to the tool support.9|.Figure 2 shows 'a motor- /driven grinder |24 mounted on said toolsupport.

The tool support i'sprovidedwith a collar portion |25 in which adepending stud |26 carried by the toolv may bev received and secured bysuitable clamping'screws |21., Figuresll and 12 show a r bracket |28which `may be secured to collar portion |25 in the same manner as thegrinding tool of Figures Zand 10, said bracket being adapted toclampingly receive the shank portion |29 of a ljusted position so thatprojections ||2 are seated in the gear openings I3, rotation of shaft|05 will be transmitted to gear |04 to thereby cause rack bar member |03to move longitudinally in groove 96. This in turn moves support member89 longitudinally on track 88 due tothe connection oi.

rack bar member |'03 with said support member 89 through block 91,'screw98 and nut 99.

Vertical rack bar |08 may be raised to a position wherein its lower endwill not engage the block 19 during the movement of said vblock and maybe locked in said inoperative position by a suitable nut, such as isshown at |09. The elevation or` 'adjustment of rack bar 08 isaccomplished by disengagingth'e sleeve projections ||2 from the gear|04,. engaging the stud ||4 byla suitable wrench or crank and therebymanually rotating thesleeve holder for a cutting torch. 4

Figures 14 and 15 illustrateV the details of the reversing clutch 48employed for reversing the shaft' 49 with'respect to'shaft45 when it isdev sredto obtain a. reversal of the direction of movement of thefollower guide 60 with respect to the direction of'rotat-ion of thefaceplate I8.V Clutch 48 comprises a bottom supporting plate |3| havingvertical arms |32, |32 which are secured' to the transverse verticalplate 25 of the table I| e to thereby support plate |3I in a horizontalposition. Secured to bottom plate 3| are .opposed unstandng bearingbrackets |33 and |34. Shaft 45 is journalled in bracket |33 and carriesat its inner end a gear formed with a toothed clutch vface |36. Shaft 49is journalled in bracket |34 and terminates adjacent the toothed clutchface` slidable onthe end of shaft 49 is a sleeve member |31 having aflrst toothed clutch kface |38 opposaavaeoa |38 but is spaced therefrom.Keyed to but axially from a comparatively simple shape (of followerguide) in most cases, and by having that motion ing clutch face |36 andan opposite toothed :clutch Y face |38. Rotatably mounted on shaft 49adjacent the bearing bracket |34 is a gear l|40 having,

.under separate control it becomes much easier to produce or modify acam than in the conventional method of combining the two components f ofmotion by the use of a master cam as the tool a toothed clutchfface |41opposing clutch `face |39. Journalled in bearing brackets |39'an'd |34is a first couhtershaft |42 carrying a gear .|43 meshing with gear |35and journalledin said bearing brackets .is a second countershaf-t |44carrying a; gear |45 meshing with both gear l|43 l and gear |40. Asuitable shifter rod, not shown, isj

employed-toshift sleeve member' |31 axially, so

that in one position of vsaid sleeve member the the interlocking clutchfaces 14| and |39 to shaft 49, causing shaft 49 to rotate in ,adirection opposite to the direction of rotation of shaft 45:

In operation of the machine, the cam blank is centered on the face plateI8 and secured thereto by suitable clamps. If a radial cam is to beformed, the screw i |1 is elevated to an inoperative position as abovedescribed. The cam forming tool -is mounted on the tool support 9|andthe inclination of the follower guide 80 is adjusted i in accordancewith theperipheral shape required for the finished cam. The tool isadjusted to its starting position at the surface of the blank.

, Crank 44 is then rotated causing simultaneous rotation' of the faceplate I8 and longitudinal movement of the rack bar 51 which carries thefollower guide 60. Follower 8|' is moved vertically by the guidingmeans.

In one method of producing cams, use is made i of a dividing head withchange gears, but in such method .the lead cannot be so convenientlyvaried lby large or small differences, as. bythe means herein disclosed.In using the master cam method, any variation of lead or other importantfeature of the work, requires a new and different master cam, whichbecause of the delay and expense involved in producing same, cannot beaction of'the moving follower guide and transmits its` vertical movementthrough block 19 to 'rack bar |08. Rack bar |08 rotates gear |04throughA gear |08 shaft |05 and clutch sleeve H0, produc-v Y inglongitudinal movement of rack bar |03, which is transmitted to supportmember 89 through block 91, screw 98 and nut 99. The cam forming tool ismoved longitudinally along with sup- 1 port member 89.

When an axial cam is to be formed, the rack bar |08 is elevated to aninoperative position and locked therein as above described. Longitudinalmovement of the follower guide 60 then produces vertical movement of theblock 19, which is transmitted to the screw member H1. The verticalmovement of screw member |1 is transmitted to the knee member 88 throughthe nut member ||8 and collar member IIB. The cam forming tool, is movedvertically along with the knee member 88. As in the case of the radialcam, the face plate I8 revolves simultaneously with the movement of thecam forming tool so that the shape of the cut made in the cylindrical.cam blank is determined by the shape and angle of adjustment of thefollower guide 60.

The follower guide 60 may have any desired shape, determined by the pathof motion which the intended cam follower for the nished cammust'assume.

An important feature of the present invention is the separation of therotational and translational motions involved in forming the cam so thatthe shape thereof may be modied by moditying the translational motion.The translational l g motion involved in forming the cam is derivedjustified for other thanlarge quantities of identical production. Inview of the above, cams are made; in many instances, by indirect andlaborious methods, resulting in much hand work and non-uniformity ofproduct. The machine herein .disclosed provides adirect and easilycontrolled method of performnig such work', and at a much lowerrequirement of skill and a much higher standard of quality.

The machine herein disclosed has various other possible uses. Bymounting suitable tools in the tool carrier, the machine may be employedfor such uses as-drilling to a pattern, milling, flame cutting proles,ilame hardening profiled surfaces, laying out lines, makingangular-measurements, and the like.,

The profile defining member 80, as above mentioned, may have any desiredshape, governed by the path of motion which the intended cam fol,

lower must assume and can be adjusted at various angles, depending uponthe range of movement required for the intended cam follower.

While a specific embodiment of a cam generating machine for the formingof axial andradial cams has been disclosed in the foregoing description,it will be understood that various modifications within the spirit ofthe invention may occur to those skilled in the art. Therefore,

it is intended that no limitations be placed on the invention other thanas defined by the scope of the appended claims:

'What is claimed is:

l. A surface generating machine comprising a support, a face platerotatively mounted on said support, means for securing a cam blank tosaid face plate, a carriage on said support, ,means for adjusting saidcarriage horizontally on said support, means for securing a tool to saidcarriage, a. profile' defining member on said support, means foradjusting the angle of inclination of said profile defining member,means for simultaneously rotating said face plate and moving saidprofile defining' member longitudinally, a follower engaging theprofiled surface of said profile defining member, a first verticallymovable member engageable with the top surface of said follower, meansfor moving the carriage longitudinally responsive to vertical movementof said first member, a second vertically movable member engageable withthe top surface of said follower, means for moving the carriagevertically responsive to vertical movement of said second' member, andindividual means for elevating said vertically movable membersindependently with respect to said follower and said carriage.

2. In a profile-generating machine including a support mounting arotatable face plate adapted to support a work piece thereon and acarriage movable on said support axially and varraeoa .u 4 .i :,rradially of said face plate 'and adapted to mount v -horizontaltransverse axis to Ydefine a plurality a roule-forming tool thereomtheimprovement l coxmprislng a, profile-defining member, means, `saidsupport, said follower surface operatively mounting said member forreciprocablefmovelment on said support, means for simultaneously ofprofiles, a follower `vertically"reciprocable on engaging said followerso as to reciprocate said g, follower upon reciprocation of saidmember,a

rotating said face plate and reciprocatingfsaidj. member, said memberincluding a follower/surface, said surface beingangularly adjustable todefine a plurality ofproilles, a followerflinearly movable on` saidsupport and operativelyienrack vertically slidable on said support andinend engageable with said fol, lower whereby said rack is verticallyreciprocable with said' follower, a horizontal rack carried by cluding alower ,1 0. said carriage, gear means carried by said carriage gagingsaid follower surface, and separate meansengageable with said followerand operativelyJ 3.- In a profile-generating machine including a tconnectedv to said carriage for selectively'moving' v1-5 atively coupledtogether so as to reciprocate said.

horizontally upon reciprocationof said support mounting a rotatablefaceplate adapted to support a work piece. thereonand acarriage movableon said support axially and radially of said face plate and adapted tomount a profileformingtool thereon, the improvement'comprissing aprofile-defining membermeans,mounting said member for reciprocablemovement onisaid support radially ofthe axis of saidface plate,'

means for simultaneously rotating said face plate and reciprocating saidmember, said member including a follower surface, said surface beingangularly adjustable to define al plurality of profiles," a follower,means mountingsaid folylower onisaid support for reciprocal movementsubstantially at right angles to the movement o f saidmember, saidfollower surface operatively y engagingsaid follower lwhereby toreciprocate said-follower upon reciprocation of said member,

85 vertical screw vertically slidable on said support lower andoperatively connected to saidicarria'ge f -and operatively engaging bothracks-and clutch 1 means operatively associated with said gear ,meansfor selectively coupling and ,uncoupling said racks, whereby at timessaid racks are opercarriage follower. i `6.- In a. profile-generatinglmachine including "a support, 'a mount for a work piece Ablank rotatable on said support on vertical axis, and a profile-forming toolcarriage mounted on said support for movement-vertically andhorizontally,

the limprovement comprising a lproiile-dening member, -means mountingsaid member on said support'k for horizontal reciprocating movement,

means for simultaneously rotating said mount and reciprocating saidmember, said memberinl` cluding an upwardly-directed follower surface,

`said surface being angularly adjustable on a horizontal transverse'axis to define a plurality o f profiles, a follower verticallyreciprocable on said support, said follower `surface operatively forselectively moving the 'latter axially and cating movement ofsaidfollower.

' 4. In aprole-generating 'machine including a radially of said. faceplate responsive to reciproto support a work piece thereon and acarriage 40 support mounting a rotatable face plate adapted f movable onvsaid support axiallyv and radially of.`

said face plate andadapted'to mount avproleformingr toolthereon, theimprovement comprisinga profile-denlngnmember, means mounting saidmember forreciprocable movement on said support radially of the axis ofsaid faceplate,

g meansfor simultaneously rotatingsaid face plate and reciprocating saidmember, said member including a follower surface, said surface beingangularly adjustable to define a plurality of profiles, Aa follower,means mounting said follower on said support for reciprocal movementsubstantially parallel tothe axis of -said face plate, said followersurface operatively engaging said follower whereby to reciprocate saidfollower upon reciprocation of said member, and

,engaging said follower. so as to reciprocate said follower upon4reciproca'tion of said member, a

and including a lower end engageable with said carriage on said screwfor vertical sliding movesaid collar and providing a seatfor said collarwhereby said carriage is vertically reciprocable with said screw, a'ndmeans forelevating said screw relative to saidcarriage whereby todisengage said lower endI of said screw from said follower. o

'1.v -In a profile-generating machine-including a support, a mount forawork piece blank' rotatable on said-support on a vertical axis, and

a profile-forming tool carriage mounted on said movement, means forsimulta eously rotating separate means engageable withsaid follower andoperatively connected togsaid carriage for selectively moving the latteraxially and radially of said face plate responsive to reciprocatingmoi/)ement of said follower.

5. In a prole-generating machine including a support, a mount ,for awork piece blank rotatable on said support ona vertical axis, and aprole-forming tool carriage mounted on said support for movementvertically and horizontally, the improvement comprising aprofile-defining member, means mounting said member on said fine aplurality of profiles, a follower vertically support for movementvertically and horizontally, the improvement comprising aprofile-defining member, means mounting said member on said support forvhorizontl reciprocating said mount andreciprocating said member, saidmemberN including an upwardly-directed follower surface, said surfacebeing angularly adjustable on a horizontal transverse axis todereciprocable on said support, said `follower surface operativelyengaging said follower so as to reciprocate said follower uponreciprocation 'of said member, a rack vertically slidable on saidsupportand including a lower end engage- 7'0 ing both racks, clutch meansoperatively assoi- Y support for horizontal reciprocating movement,

means for simultaneously rotating said mount and reciprocating saidmember, said member including an upwardly-directed followersurface,

said surface being angularly adjustable on a able with, said followerwhereby said rack is vertically` reciprocable with-said follower, ahorizontal rack carried bysaid carriage, gear means carried by saidcarriage and operatively engagciated with said gear means forselectively coupling and uncoupling said racks, whereby at times saidvracks are operatively coupled together so as toreciprocate saidcarriage-horizontally upon reciprocation of said follower, a

ment relative thereto,` a nut on said screw below' said followervwhereby said screw isl vertically reciprocable with said follower, acollar mounting said carriage on said screw for verticalsliding movementrelative thereto, a nut on said screw below said collar and providing aAseat for said collar whereby said carriage is vertically reciprocablewith said screw, and means for elevating v said screw relative to saidcarriage whereby to disengage said lower end of said screw from saidfollower.

8. In a profile-generating machine including a support, `a mount for awork piece rotatable on i said' support, and a tool' carriage movable onsaid support inplanes parallel to the axis of jsa'id mount and in planesnormal to the axis of' said mount,` theimprovementcomprising aprotile-defining guide, -means' mounting said guide on said support forreciprocating movement in,

a plane normal to the axis of said mount, said ,guide including a guidemember pivoted thereon f vertical screw vertically slidable'on saidsupfA- Iport and including a` lower en'd engageable with l2 carriage, anangulariy-adlustable' Vproilling guide longitudinally reciprocable onsaid support, means said follower, means for moving the carriage inanother direction responsive` tol movement oi saidl second member, andseparate means for selectively securing one of said first and secondmembers in an inoperative position out of engagement with said follower.

1i. A surface-generating machine, comprising a support, a face platerotatably mounted on said support, means for. clamping a work piece tosaid face plate, a carriage on said support, a tool,

means for securing said tool to said carriage, an

v angularlyadjustable proiiling guide reciprocable for angular,adjustment relative thereto/ a pair 1 of opposed arcuate extensions ofsaid guides, 'means slidably connecting opposite portions of said guidememberito said extensions, a pair of clamps ior clamping suchportions'to said extensions for locking said guide member inangularly-adjusted relation to said guide, and rack and pinion means'operatively associated with said guide member iorsimultaneouslyactuating both of said clamps.

9. A surface-generating machine, comprising a support. a face platerotatably mounted on said support, means for clamping a work piece tosaid face plate, a carriage on said support, atool, means for securingsaid tool to said carriage, a proiillng follower guide reciprocable onsaid snpport, means for adjusting said guide for delining a plurality ofproilles, means for simultaneouslyrotating said plate and reciprocatingsaid follower guide, a follower engageable with said fguide andreciprocable thereby, A and settable means operatively associated withsaid follower for moving said carriage in axial and normal planesrelative to the axis of said face plate in response to reciprocatingmovement of said iollower. t

10. A surface-generating machine, comprising a support,` a face platerotatably mounted on said support, means for securing a work piece tosaid face plate, a carriage on said support, a forming f tool, means forsecuring said forming tool to said on said support, means riorsimultaneously rotating -said face plate and reciprocating said guide, asingle follower engaging said guide and reciprocated thereby, a pair ofseparate settable means engageable with said follower and reciprocatedthereby and therewith, said means being operatively coupled to saidcarriage' for moving the same axially and radially relative to an axisparallel to the axis of said face plate in response to reciprocatingmovement of said guide and follower, means for varying the angularposition of said guide, and .means for selectively inactivating one ofsaid settable means.

GEORGE X. JOHNSTON.

REFERENCES CITED 'The following referenlces are of record in the NumberName Date 980,122 Pierson Dec. 27, 1910 1,689,370 Tessky Oct. 30, 19282,053,597 Bishop Sept. 8, 1936 2,321,789 Atherholt et al. June l5, 19432,366,993 Autos Jan. 9, 1945 2,386,973 Mietli Oct. '16, 1945 2,436,588Martin Feb. 24, 19,48

, FOREIGN PATENTS NumberJ Country Date 365,905 l Great Sritain Jan. 28,1932

